Katey Sagal and Jack McBrayer Will Play Penny’s Family on The Big Bang Theory

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Jack McBrayer and Katey Sagal. Photo: Getty Images

Katey Sagal and Jack McBrayer will join the cast of The Big Bang Theory this season as Penny's mother and brother, respectively, the show's producers announced at San Diego Comic-Con on Friday. This will be the second time Sagal has played Kaley Cuoco's mother on a sitcom; the pair previously co-starred on ABC's 8 Simple Rules from 2002 to 2005. In fact, if you imagine that Amy Davidson grew up to look exactly like Jack McBrayer — a bit of a stretch, yes, but just go with it — why don't we pretend this entire season of BBT is just an 8 Simple Rules reboot? [Sweet guitar lick plays.]